Where the fear of making mistakes comes from

A 2-year-old knocks over a tower and builds it again. She doesn't feel ashamed: shame as an emotion doesn't exist for her yet. It appears around the third year of life - along with the ability to see yourself from the outside. Not "the tower fell," but "I'm the one whose tower fell."

From this point on, a child reads an adult's face faster than the result itself. A mistake means nothing on its own - its meaning comes from what happens in the next 5 seconds. And that meaning accumulates.

The least obvious part here is the second line. The difference between the two kinds of praise seems cosmetic, but it works like a fork in the road.

In experiments by psychologist Carol Dweck and her colleagues, schoolchildren were given tasks and praised differently after their first success. Some were praised for a trait: "you must be smart." Others were praised for effort: "you must have worked hard." Then everyone got a series of deliberately overly difficult tasks, and almost no one managed them.

After that, the groups diverged. Those praised for being smart chose an easier next task, were less willing to continue, and more often inflated their results when telling other children about them. Those praised for effort more often chose a harder task.

The logic is simple. If I'm good because I'm smart, then a mistake is proof of the opposite, and I need to hide it. If I'm good because I try, a mistake is just data about the method.

Then the body joins in. The brain flags a mistake in the first fractions of a second - before you have time to consciously register it; this spike shows up on an EEG. It grows stronger with age and, according to some data, is more pronounced in children whose adults reacted harshly to mistakes. One honest caveat: school-based "growth mindset" programs have a small effect on average, while the difference between trait praise and effort praise has been replicated in different experiments.